CO2.... Too much of a good thing??

Im using CO2 in my grow room (provider by CO2 tank) and had a couple of questions.

1.how high can CO2leaves get before they become toxic for the plant?
2.what does CO2poisoning look like,what are the sypthoms?
3.how do i now my plaint is gitting to much CO2?
4.how long does it take for plants to start showing signs of CO2 poisoning?
5.can i cure plant that have been exposed to toxic levels of CO2 for a long piriod of time?
6.how long would it take for plant to show improvement from CO2poisoning?
7.how long can a plant live in toxic levels of CO2 before it to late....?

Hope any one can help . Thanks.

bump ....yeah

I imagine your gonna need a controller for that to determine what ppm's you have anyway to know what ppm is.
Are you just running C02 full time if so its a waste. Only during day should you run. There's quite a few things to take in. If your running 1200 to 1500ppm your fine.

If you dont have a CO2 controller then try this:

http://www.hydroponics.net/learn/co2_calculator.asp

Give the man above some rep man!

In your case I would worry more about toxic levels for humans. Just saying/

stumps said:

In your case I would worry more about toxic levels for humans. Just saying/

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5000ppm to get you dizzy, 10000 kills you.

Gastanker said:

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250% though? I'm thinking something like 130% might be the maximum increase in growth rate for co2.

First thing you need to do is get a Co2 monitor to measure PPM. Then you can adjust the regulator on the Co2 tank according to what your level is. You are also going to need a sealed/vented system on a timer with a heater. Your grow room needs to be at least 80 F to take full advantage of the extra co2. If you are flowering, only supplement Co2 when the lights are on. Also, make sure to have PLENTY of ventilation because the Co2 gas is heavier than o2 and will settle at the floor. You will need to seal the room for a few hours at a time then vent to get fresh oxygen in the room (or supplement with bottled o2) Never run more than 1500 PPM, it's just a waste.

stumps said:

In your case I would worry more about toxic levels for humans. Just saying/

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The mythbusters tried to kill Jamie....and failed lol. Seems as though you need a shitload of CO2 to do some damage.

mattmo91 said:

vent to get fresh oxygen in the room (or supplement with bottled o2).

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not necessary. the o2 in air is about 19%,i.e. 190,000 ppm, the plants only use a small fraction of that and anyhow they actually generate o2, as you might remember from grade school. the co2 however is naturally at 300ppm and therefore can become depleted easily.

most enriched rooms ive seen are 1500-1800 i dont know where that graph came from the science behind the numbers we use is from when dinosousre were here and plants were huge and co2 levels on earth were supposedly in the 1500-1800ppm range.